An electromagnetic valve

Abstract

The utility model relates to solenoid valve field, concretely is a kind of solenoid valve, including valve body, valve core subassembly and drive assembly, the valve core subassembly includes shaft core, the shaft core includes main part and the connecting portion of both ends, the connecting portion of both ends is respectively connected with first sealing assembly and second sealing assembly, the first sealing assembly includes the first collar of the connecting portion, first baulk and first sealing ring of setting, the first collar circumferential portion extends to the formation annular first clamping portion in axial direction, the first baulk, first collar and the first clamping portion jointly form annular first sealing groove, and the first sealing ring is set in the first sealing groove. By the setting of the sealing groove with the bottom width of baulk and clamping portion and collar is large and the width of opening is small, sealing ring is firmly clamped in sealing groove, avoid the occurrence of the situation that sealing performance is influenced by the fact that sealing ring separates.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, and in particular to an electromagnetic valve. Background Technology

[0002] As a valve body that controls fluid flow, a solenoid valve has a valve core that opens and closes the flow path. The valve core drives a piston structure inside the valve body to control the opening and closing of the flow path. In the flow of high-pressure gas, the connection point of the solenoid valve needs to withstand high pressure, which can easily lead to leakage. Existing technology typically uses rubber rings for sealing. For axial sealing, only a mounting groove needs to be made on the valve core, and the rubber ring is fitted and embedded in the groove. For radial sealing, an annular mounting groove is made on the radial surface, and the rubber ring is directly or assembled into the groove using an adhesive material. However, after long-term use, the rubber ring is prone to detachment, leading to poor sealing. Moreover, as the valve core moves axially, the sealing ring constantly collides and contacts the valve body, further affecting the stability of the sealing ring connection. Therefore, how to design the sealing structure of the solenoid valve to ensure the stability of its operation is a problem that those skilled in the art need to consider. Utility Model Content

[0003] The purpose of this invention is to provide a solenoid valve to solve the problems of unstable sealing of solenoid valves under high pressure in the prior art.

[0004] The technical solution of this utility model is: an electromagnetic valve, including a valve body, a valve core assembly and a drive assembly, wherein the valve body is provided with an air inlet chamber and an air outlet chamber, and a valve cavity is formed between the valve core assembly and the valve body, and the drive assembly drives the valve core assembly to move, so that the valve cavity is sequentially connected to the air inlet chamber and the air outlet chamber;

[0005] The valve core assembly includes a shaft, which includes a main body and connecting portions at both ends. The connecting portions at both ends are respectively connected to a first sealing assembly and a second sealing assembly. The first sealing assembly includes a first collar, a first retaining ring, and a first sealing ring sleeved on the connecting portion. The first collar extends axially at its circumference to form an annular first snap-fit ​​portion. The first retaining ring, the first collar, and the first snap-fit ​​portion together form an annular first sealing groove. The first sealing ring is disposed in the first sealing groove.

[0006] Preferably, a first step and a second step are formed between the connecting portions at both ends of the main body, and the two ends of the first retaining ring along the axial direction are respectively connected to the first step and the first collar.

[0007] Preferably, the outer diameter of the first collar has a uniformly varying axial dimension, and the cross-section is inclined, forming the inner wall of the first sealing groove;

[0008] The inner diameter of the first snap-fit ​​part is a structure with an axial dimension variation and an inclined cross-section, forming the outer wall of the first sealing groove;

[0009] This makes the width of the opening of the first sealing groove smaller than the width of its bottom.

[0010] Preferably, the first sealing ring protrudes axially away from the first collar on one side and engages with the first retaining ring and the first snap-fit ​​portion.

[0011] Preferably, a third step is formed between the intake chamber and the valve chamber. When the valve core assembly moves, the first sealing ring abuts against or moves away from the third step, thereby opening and closing the intake chamber and the exhaust chamber.

[0012] Preferably, the second sealing assembly includes a second collar, a second retaining ring, and a second sealing ring sleeved on the connecting portion. The collar extends axially at its circumference to form an annular second snap-fit ​​portion. The second retaining ring, the second snap-fit ​​portion, and the second collar together form a second sealing groove, and the second sealing ring is disposed within the second sealing groove.

[0013] Preferably, a fourth step is formed between the exhaust chamber and the valve chamber. When the valve core assembly moves, the second sealing ring abuts against or moves away from the fourth step to realize the opening and closing of the exhaust chamber and the valve chamber.

[0014] Preferably, an elastic element is provided in the air intake chamber, and the elastic element has a driving force to drive the valve core assembly to move towards the exhaust chamber.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] (1) By forming a sealing groove with a large bottom width and a small opening width by means of the retaining ring, the snap-fit ​​part and the collar, the sealing ring is firmly clamped in the sealing groove to avoid the sealing ring from coming off and affecting the sealing performance;

[0017] The separate design of the retaining ring and the collar makes the installation of the sealing ring more convenient. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a schematic diagram of the structure of the solenoid valve described in this utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at point BB;

[0021] Figure 3 for Figure 2Schematic diagram of the cross-sectional structure at point AA;

[0022] Figure 4 This is a schematic diagram of the valve core assembly described in this utility model.

[0023] Wherein: valve body 1, exhaust chamber 1a, intake chamber 1b, valve chamber 1c, upper valve block 11, middle valve block 12, third step 121, fourth step 122, lower valve block 13, exhaust port 14, intake port 15, and output port 16.

[0024] Valve core assembly 2, shaft core 21, main body 211, connecting part 212, first step 213, second step 214, first sealing assembly 22, first sealing groove 22a, first collar 221, first retaining ring 222, first sealing ring 223, first snap-fit ​​part 224, second sealing assembly 23, second sealing groove 23a, second collar 231, second retaining ring 232, second sealing ring 233, second snap-fit ​​part 234;

[0025] Drive component 3, armature component 31, elastic element 32. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments:

[0027] like Figure 1-4 As shown, this utility model is a solenoid valve for controlling the on / off of high-pressure gas. It includes a valve body 1, a valve core assembly 2, and a drive assembly 3. The valve body 1 includes an upper valve block 11, a middle valve block 12, and a lower valve block 13, which are directly fixed and sealed together. The chamber formed between the upper valve block 11 and the middle valve block 12 is an exhaust chamber 1a, which is provided with an exhaust port 14 communicating with the outside. The chamber formed between the middle valve block 12 and the lower valve block 13 is an intake chamber 1b, which is provided with an intake port 15 communicating with the outside. The intake port 15 is connected to a gas source generating device (not shown in the figure). The lower valve body 1 is provided with an output port 16, which communicates with the valve chamber 1c and is also connected to an external working device (such as a cylinder, etc., not shown in the figure). In addition, the diameter of valve chamber 1c is smaller than the diameter of exhaust chamber 1a and intake chamber 1b. Therefore, a third step 121 is formed between valve chamber 1c and intake chamber 1b, and a fourth step 122 is formed between valve chamber 1c and exhaust chamber 1a.

[0028] One end of the valve core assembly 2 is in the exhaust chamber 1a, and the other end is in the intake chamber 1b. The middle section passes through the middle valve block 12 and together with the middle valve block 12 forms the valve chamber 1c.

[0029] The drive assembly 3 includes an armature assembly 31 disposed inside the upper valve block 11 and an elastic element 32 disposed in the intake chamber 1b. The elastic element 32 can be a spring, one end of which is connected to the lower valve block 13 and the other end of which is connected to the valve core assembly 2, and it has a tendency to drive the valve core assembly 2 to move away from the lower valve body 1. When the armature assembly 31 is energized, it drives the valve core assembly 2 to move towards the intake chamber 1b, thereby closing the exhaust chamber 1a and connecting the intake chamber 1b with the valve chamber 1c. Gas from the gas source generator passes sequentially through the intake port 15, the intake chamber 1b, the valve chamber 1c, and the output port 16 to enter the working equipment to drive the working equipment. At this time, the elastic element 32 is compressed. When the armature assembly 31 is de-energized, driven by the elastic element 32, the valve core assembly 2 moves towards the exhaust chamber 1a, thereby connecting the exhaust chamber 1a with the valve chamber 1c, while the intake chamber 1b and the valve chamber 1c are closed. This prevents the gas source from entering; at the same time, the gas in the working equipment is discharged sequentially from the output port 16, valve chamber 1c, exhaust chamber 1a and exhaust port 14, so that the working equipment is reset.

[0030] For ease of explanation, the following is as follows: Figure 1 As shown, the upper valve body 1 is above the middle valve body 1, and the lower valve body 1 is below the middle valve body 1, which are described as the upper and lower directions. At the same time, the axial direction of the shaft core 21 is taken as the vertical direction.

[0031] The valve core assembly 2 includes a shaft core 21, which includes a main body 211 and connecting portions 212 at both ends. The lower end of the main body 211 forms a first step 213 with the connecting portion 212 and is connected to a first sealing assembly 22; the upper end forms a second step 214 with the connecting portion 212 and is connected to a second sealing assembly 23.

[0032] The first sealing assembly 22 includes a first collar 221, a first retaining ring 222 and a first sealing ring 223 sleeved on the connecting portion 212. The first collar 221 extends axially around its circumference to form an annular first snap-fit ​​portion 224. The first retaining ring 222, the first collar 221 and the first snap-fit ​​portion 224 together form an annular first sealing groove 22a. The first sealing ring 223 is disposed in the first sealing groove 22a.

[0033] In this embodiment, the diameter of the first sealing ring 223 is larger than the diameter of the valve cavity 1c. The outer diameter of the first collar 221 has a uniformly varying axial dimension and an inclined cross-section, forming the inner wall of the first sealing groove 22a; the inner diameter of the first snap-fit ​​portion 224 has a varying axial dimension and an inclined cross-section, forming the outer wall of the first sealing groove 22a, such that the width of the opening of the first sealing groove 22a is smaller than the width of its bottom. When the first sealing ring 223 is connected in the first sealing groove 22a, its upper end protrudes from the first retaining ring 222 and the first snap-fit ​​portion 224, so that when the valve core assembly 2 moves upward, the first sealing ring 223 abuts against the third step 121, forming a seal.

[0034] When the first sealing ring 223 is in place, the first sealing ring 223 is connected to the inner ring of the first snap-fit ​​portion 224, and then the first retaining ring 222 is connected to the inner ring of the first sealing ring 223; the first collar 221 is fitted onto the connecting portion 212, and the first collar 221 is pressed against the first retaining ring 222 by the tightening action of the bolts, so that the first collar 221 abuts against the first retaining ring 222 to the first step 213.

[0035] The second sealing assembly 23 includes a second collar 231, a second retaining ring 232, and a second sealing ring 233 sleeved on the connecting portion 212. The second collar extends axially to form an annular second snap-fit ​​portion 234. The second retaining ring 232, the second snap-fit ​​portion 234, and the second collar 231 together form a second sealing groove 23a. The second sealing ring is disposed in the second sealing groove 23a.

[0036] In this embodiment, the second sealing component 23 is the same as the first sealing component 22 in terms of sealing structure and sealing principle, and will not be described again.

[0037] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A solenoid valve, characterized in that: The device includes a valve body, a valve core assembly, and a drive assembly. The valve body is provided with an air intake chamber and an exhaust chamber. A valve cavity is formed between the valve core assembly and the valve body. The drive assembly drives the valve core assembly to move, so that the valve cavity is sequentially connected to the air intake chamber and the exhaust chamber. The valve core assembly includes a shaft, which includes a main body and connecting portions at both ends. The connecting portions at both ends are respectively connected to a first sealing assembly and a second sealing assembly. The first sealing assembly includes a first collar, a first retaining ring, and a first sealing ring sleeved on the connecting portion. The first collar extends axially at its circumference to form an annular first snap-fit ​​portion. The first retaining ring, the first collar, and the first snap-fit ​​portion together form an annular first sealing groove. The first sealing ring is disposed in the first sealing groove.

2. The solenoid valve according to claim 1, characterized in that: A first step and a second step are formed between the connecting parts at both ends of the main body, and the two ends of the first retaining ring along the axial direction are respectively connected to the first step and the first collar.

3. A solenoid valve according to claim 2, characterized in that: The outer diameter of the first collar is a structure with a uniformly varying axial dimension, and the cross-section is inclined, forming the inner wall of the first sealing groove; The inner diameter of the first snap-fit ​​part is a structure with an axial dimension variation and an inclined cross-section, forming the outer wall of the first sealing groove; This makes the width of the opening of the first sealing groove smaller than the width of its bottom.

4. A solenoid valve according to claim 3, characterized in that: The first sealing ring protrudes axially from the side away from the first collar and is connected to the first retaining ring and the first snap-fit ​​portion.

5. A solenoid valve according to claim 4, characterized in that: A third step is formed between the intake chamber and the valve chamber. When the valve core assembly moves, the first sealing ring abuts against or moves away from the third step, thereby opening and closing the intake chamber and the exhaust chamber.

6. A solenoid valve according to claim 2, characterized in that: The second sealing assembly includes a second collar, a second retaining ring, and a second sealing ring sleeved on the connecting portion. The collar extends axially at its circumference to form an annular second snap-fit ​​portion. The second retaining ring, the second snap-fit ​​portion, and the second collar together form a second sealing groove. The second sealing ring is disposed within the second sealing groove.

7. A solenoid valve according to claim 6, characterized in that: A fourth step is formed between the exhaust chamber and the valve chamber. When the valve core assembly moves, the second sealing ring abuts against or moves away from the fourth step, thereby opening and closing the exhaust chamber and the valve chamber.

8. A solenoid valve according to claim 2, characterized in that: An elastic element is provided inside the air intake chamber, and the elastic element has a driving force to drive the valve core assembly to move towards the exhaust chamber.

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